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The invention provides an ecological well lid with an auxiliary irrigation function for a municipal greening lawn, and relates to the field of urban infrastructure. The ecological well lid aims to solve the problems that when a traditional well lid is installed and used in a lawn area, the traditional well lid is difficult to well integrate into a surrounding lawn greening environment, the traditional well lid seems to be abrupt, the function of the well lid is relatively simplified, the sealing operation of a well mouth can only be realized, and rainfall cannot be effectively collected and utilized. The ecological well lid comprises a well lid body and a fixing pin, wherein the top end of the well lid body is installed inside a well base, the outer sides of the two ends of the well lid body are each provided with a positioning convex block, the inner sides of the two ends of the well base are each provided with a positioning groove, and the positioning convex blocks at the two ends of the well lid body are slidably connected into the positioning grooves in the two ends of the well base respectively. According to the ecological well lid, turf inside a greening planting groove is used for greening and covering the top of the well lid body, so that the conflict feeling between the well lid body and the lawn is reduced; and water vapor evaporated by the rainfall inside a water storage cavity enters humus inside the greening planting groove through a sand-based water permeable plate, so that the water content inside the humus is guaranteed.